vue 实现路由跳转时更改页面title

export default new Router({
 routes: [
 {
  path: '/',
  name: 'index',
  component: index,
  meta: {
   title: 'title1'
  }
 },
 {
  path: '/studentInfo',
  name: 'studentInfo',
  component: studentInfo,
  meta: {
   title: 'title2'
  }
 }   
 ]
})

router.beforeEach((to, from, next) => {
 /* 路由发生变化修改页面title */
 if (to.meta.title) {
  document.title = to.meta.title
 }
 next()
})